Half-wrapped customized finger joint prosthesis

Abstract

The invention relates to the technical field of medical prostheses, and provides a half-wrapped customized finger joint prosthesis. The half-wrapped customized finger joint prosthesis comprises a phalanx near-end prosthesis, a ball head and a phalanx far-end prosthesis, wherein the phalanx near-end prosthesis, the ball head and the phalanx far-end prosthesis are connected in sequence; the phalanx far-end prosthesis is provided with a phalanx far-end prosthesis handle; the phalanx far-end prosthesis is designed according to the phalanx size of a patient and is formed through 3D printing, and the structural size of the ball head and the structural size of the phalanx far-end prosthesis are determined through the printing structural size of the phalanx near-end prosthesis; the ball head is screwed into the phalanx near-end prosthesis, and a phalanx near-end prosthesis handle is inserted into a bone cavity at the near end of the phalanx; the phalanx far-end prosthesis handle is inserted into the bone cavity at the far end of the phalanx, and is matched with a bone adhesive to complete fixation of the phalanx far-end prosthesis handle in the bone cavity; and finally, the ball head is plugged into the phalanx far-end prosthesis. The half-wrapped customized finger joint prosthesis has the beneficial effects that the ball head is plugged into a phalanx far-end prosthesis ball socket, the ball head extends into the phalanx far-end prosthesis ball socket to form half-wrapped type cooperation, and joint dislocation can be effectively prevented in a using process.

Description

technical field [0001] The invention relates to the technical field of medical prostheses, in particular to a semi-enclosed customized finger joint prosthesis. Background technique [0002] Chinese patent CN105496612 B discloses a knuckle prosthesis, including: knuckles, including a connected ball head and a knuckle handle, protruding first longitudinal ribs are arranged on both sides of the knuckle handle near the end of the ball head Metacarpophalangeal joints, including connected ball heads and metacarpophalangeal joint handles, protruding second longitudinal ribs are provided on both sides of the metacarpophalangeal joint handle near the end of the ball head, and the second longitudinal ribs and the first longitudinal ribs can be embedded The patient's body to prevent the metacarpophalangeal joints and finger joints from rotating in the patient's body. A knuckle prosthesis of the present invention has enhanced surface roughness, is beneficial to bone ingrowth, and prolo...

AI Technical Summary

Problems solved by technology

[0003] However, the knuckle prosthesis in the existing patent has the following defects: (1) the ball and socket head and the knuckle handle that cooperate with each other are easy to cause joint dislocation during use; (2) the knuckle prosthesis is difficult to use in later revision; (3 ) The handle of the knuckle prosthesis is too smooth, which is not conducive to bone cavity fixation

Images